Cooling filter rod, application thereof and cigarette

ABSTRACT

A cooling filter rod, an application, and a cigarette are provided. The cooling filter rod is mainly formed by cooling particles. The cooling particle includes a particle body and a shell coated on the particle body. The shell or the particle body contains a phase change material. The phase change material is coated on the surface of the particle material to form cooling particles, and the cooling particles are integrally formed into a cooling filter rod, which can be directly used for cigarette production after being compounded with conventional filter rods. The cooling effect can be controlled according to the amount of the phase change material and the cooling filter rod. Such a filter rod can realize industrial production and has low cost and good cooling effect.

FIELD OF THE INVENTION

The present invention relates to a cooling filter rod, an applicationthereof and a cigarette, belonging to the technical field of cigaretteproduction.

BACKGROUND OF THE INVENTION

In the smoking process of traditional cigarette, the heat generated by acigarette burning cone will be carried by mainstream smoke to a filter,and as the smoking progresses, the temperature of smoke passing throughthe filter gradually increases. Studies have shown that the temperatureof the smoke at the filter can be as high as 70-80° C. near the end ofsmoking. Too high temperature at the filter will affect the retentioneffect of the filter, and will also affect consumer's evaluation on thesensory quality of smoke. Therefore, it is necessary to appropriatelyreduce the temperature of smoke. A heat-not-burn cigarette producessmoke by heating the tobacco product with an external heating element.Generally, the tobacco product reaches an atomization condition at250-350° C. In order to ensure the amount of smoke, low or no adsorptionis usually required at the filter. The temperature of high-temperatureatomized smoke entering the mouth through the filter will be higher thanthat of traditional cigarette burning. Therefore, appropriate reductionof the temperature of smoke is also a key technology for the developmentof low-temperature cigarettes. Chinese patent CN201510045745.4 providesa filter and a cigarette. The temperature of smoke is reduced by addinga phase change material to the filter, the phase change material used isa mixture of a hydrated inorganic salt and urea, and the mixture issprayed onto a cellulose acetate rod or its crystal is placed betweentwo filters. As known in the industry, the use and effect of thishydrated salt are not ideal. Chinese patent CN101396173 provides avortex cooling and flavor keeping method for a cigarette and a cigarettestructure. Vortex channels are formed in front of a cigarette filter toachieve the same cooling effect as air, but the structure is complicatedand not suitable for heat-non-burning cigarette.

The perfuming treatment through the filter is generally in the form ofperfuming particles, perfuming threads or capsules. For example, Chinesepatent CN101390657 discloses a cigarette filter rod with a function ofmint sustained release and a production process thereof. The perfumingmeans is to use cotton threads impregnated with perfume, but it isdifficult to achieve continuous perfuming.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is, whencigarettes (including traditional cigarettes and heat-not-burncigarettes) are smoked, the temperature of smoke generated by combustionis relatively high, causing a burning sensation in the mouth ofconsumers to affect the smoking experience. In order to solve the abovetechnical problem, the technical solution of the present invention is asfollows:

A cooling filter rod is mainly formed by cooling particles; the coolingparticle includes a particle body and a shell coated on the particlebody, and the shell/or the particle body contains a phase changematerial.

In this way, the cooling particles used have a core-shell structure, andthe surface shells are distributed with the phase change material, whichhas a cooling function. The cooling filter rod can be obtained bymolding of the cooling particles according to the required shape; afterthe cooling particles are stacked in a certain shape, the entire coolingfilter rod formed has a loose and porous structure; when the coolingfilter rod is applied to a cigarette product and high-temperature smokepasses through the cooling filter rod, the smoke can pass smoothly; andon the other hand, the high-temperature smoke has a large contact areawith the shells, so the cooling efficiency is high, a good coolingeffect can be achieved, and the experience of a smoker is improved.

Optionally, only the shell contains the phase change material;optionally, only the particle body contains the phase change material;optionally, both the shell and the particle body contain the phasechange material.

In some embodiments of the present invention, the shell is composed of aphase change material.

Further, the phase change material includes at least one of PLA,polyethylene glycol, stearic acid, palmitic acid, paraffin,microcrystalline wax, EVA, pentaerythritol, stearate-isopropanol ester,and stearate-glycerol ester. The suitable phase change material canensure a good cooling effect while ensuring the coating effect, therebyimproving the overall cooling performance of the cooling filter rod.Preferably, the phase change material includes a mixture of PLA,polyethylene glycol, stearates (including series stearates) and EVA.

In some embodiments of the present invention, the shell further containsa flavor enhancer. In this way, the shell of the cooling particlecontains a phase change material and a flavor enhancer, and after thecooling particles are stacked in a certain shape, the entire coolingfilter rod formed has a loose and porous structure, and the smoke canpass smoothly; in addition, when the cooling filter rod is applied to acigarette product and high-temperature smoke passes through the coolingfilter rod, the high-temperature smoke has a large contact area with theshells, and the phase change material has a high absorption efficiencyon the heat of smoke, so the cooling efficiency is high, a good coolingeffect can be achieved, and the experience of a smoker is improved;meanwhile, the flavor enhancer in the shells is heated to slowly emitflavor, and the flavor enters the mouth of the smoker together with thesmoke to give the smoke a unique taste, which can meet individualsmoking needs; and when the phase change material undergoes a phasechange by absorbing heat, the flavor ingredients inside the shell can beslowly released to add the flavor continually. Generally, thevolatilization of the flavor enhancer to produce flavor is also a heatabsorption process, and is also beneficial to the reduction of smoketemperature.

Further, the flavor enhancer includes a flavor and/or a tobacco extract;preferably, the mass ratio of the phase change material to the flavorenhancer is 100: (0.5-10). Optionally, the flavor includes at least oneof menthone and coffee flavor, which can be specifically selected asrequired, and other types of flavors can also be selected as required.

Further, the mass of the shell accounts for 0.5-30% of the total mass ofthe cooling particle, preferably 1-20%. The proper amount of the phasechange material can ensure that the cooling effect meets therequirements, and channels of the filter rod will not be blocked whenthe phase change is repeated in the smoking process.

In some embodiments of the present invention, the particle body containsplant fiber powder and/or inorganic material powder, and further, theplant fiber powder and/or inorganic material powder have a particle sizeof 80-200 meshes, preferably 100-180 meshes.

Further, the plant fiber powder includes at least one of tobacco powder,corncob powder, rice husk powder, walnut shell powder, coconut shellpowder, tangerine peel powder, and grapefruit peel powder. The plantpowder is natural, pollution-free and cheap, can be prepared into denseparticles to reduce the adsorption efficiency, is more suitable forlow-temperature cigarettes, and can reduce the loss of cutters duringthe preparation of the cooling filter rod and cigarettes. Further, theinorganic material powder includes at least one of calcium carbonate,carbon powder, ceramics, silica gel, and molecular sieves. The use ofinorganic materials does not introduce peculiar smell, and at the sametime, the porous property is partially utilized, so that the coolingfilter rod has better adsorption performance and is more suitable forordinary cigarettes. Further, the particle body further includes anauxiliary molding material, and the auxiliary molding material includesat least one of a binder, a wetting agent, and an excipient.

Further, the binder includes at least one of PVP, HPC, HPMC, SCMC, andmodified starch; the wetting agent includes water or alcohol; and theexcipient includes microcrystalline cellulose and lactose. The suitablebinder and wetting agent can ensure that the prepared particles havegood shape and strength.

By reasonably adjusting the ratio of the plant fiber powder and theinorganic material powder, the adsorption performance of the coolingfilter rod can be adjusted to an appropriate range, and the needs ofdifferent cigarettes can also be met.

In some embodiments of the present invention, the particle body isobtained by thoroughly mixing base powder, hot melt adhesive powder,excipients, and water, granulating, drying, and sieving; wherein thebase powder includes at least one of plant materials, inorganicmaterials, and metal powder; further, the plant materials include atleast one of tobacco raw materials, straw, peanut shells, bagasse,corncobs, pericarp, and aromatic plants; the inorganic materials includeat least one of carbon powder, clay, calcium carbonate, and siliconoxide; and the metal powder includes at least one of iron powder,aluminum oxide, and copper powder. Generally, the ratio of base powder,hot melt adhesive powder, excipients, and water can be selectedaccording to needs, as long as they can be used for normal and smoothgranulation and formation. The use of plant materials can reduce costsas much as possible, and the aromatic plants also have a flavoringeffect in the filter rod. The inorganic materials and the metal powderwill not introduce peculiar smell, and the metal powder is more helpfulfor the cooling effect. Further, the aromatic plants include at leastone of sandalwood, agarwood, cloves, coffee, and anise.

Further, the hot melt adhesive powder includes at least one of EVA, TPU,PE, PA, and PES. The hot melt adhesive powder can ensure the formationof particles and the formation of particle rods. Meanwhile, the hot meltadhesive powder has certain phase change capability, so they can achievea phase change cooling effect to a certain extent. The mass ratio of thehot melt adhesive powder in the cooling particles is 5%-50%, preferably10%-40%, and the content of other ingredients can be adjusted asrequired. The proper amount of hot melt adhesive can ensure sufficientadhesion, and excessive amount may block the channels during melting toaffect the cooling effect.

Optionally, the excipients include microcrystalline cellulose andpre-gelatinized starch. Further, the cooling particles have a diameterof 10-50 meshes, preferably 20-35 meshes.

Further, when used to cool the heat-not-burn cigarettes, the coolingparticles are granulated by extrusion rounding, are spherical orapproximately spherical particles, and have a bulk density of 0.8 to 2.5g/ml. The spherical or approximately spherical shape can ensure complexenough and continuous smoke channels inside the cooling filter rod, andthe high enough particle density can ensure that its adsorptionperformance is minimized without affecting the amount of smoke producedby the cigarette.

Further, when used for cooling conventional cigarettes, the coolingparticles are spherical or amorphous, and have a bulk density of 0.4 to1.6 g/ml. It can ensure complex enough and continuous smoke channelsinside the cooling filter rod, and the low particle density can ensurethat the internal pores of the particles are not completely blocked, sothat the particles still have certain adsorption performance.Preferably, the moisture content of the cooling particles is 5-15wt %,and further is 7-12wt %. Keeping the moisture content in a propermoisture content range can keep the cigarette in a good mouthfeel duringsmoking, and can prevent mildew for the cooling filter rod containingplant fiber powder.

The particles of proper diameters can ensure sufficient air permeabilityinside the filter rod, and the proper moisture facilitates storage andforming control.

Further, the effective porosity inside the cooling filter rod is 65-95%.In this way, the entire cooling filter rod has a porous structure withcomplex and continuous channels formed inside; after thehigh-temperature smoke enters the cooling filter rod from one end of thecooling filter rod, the high-temperature smoke is quickly dispersed inthe pores in the cooling filter rod and fully contacts the coolingparticles to exchange heat, thus realizing cooling; in addition, thehigh-temperature smoke has a long distance of travel in the coolingfilter rod, so the cooling effect achieved is good. The sufficienteffective porosity can meet the needs of air permeability inside thefilter rod.

Further, the effective porosity inside the cooling filter rod is 80-95%.

Further, the porous structure is honeycomb-like.

Optionally, the cooling filter rod is a loose and air-permeablecylinder.

Further, the cooling filter rod is formed by the bonding of the coolingparticles through a binder.

Further, the cooling filter rod is mainly formed by the coolingparticles through the way of microwave heating or heat solidification.

Further, the cooling filter rod is connected to a cut tobacco section ora smoking section for smoking, wherein the cooling filter rod is closeto the cut tobacco/smoking section. Optionally, a preparation method ofthe cooling filter rod includes the following steps:

(1) mixing plant fiber powder and/or inorganic material powder withrelevant auxiliary molding materials, granulating, drying, and screeningto obtain particle bodies; then coating the particle bodies with a phasechange material to obtain cooling particles; and

(2) molding the cooling particles obtained in step (1) to obtain thecooling filter rod; or,

1) thoroughly mixing at least one of plant materials/inorganicmaterials/metal powder, hot melt adhesive powder, microcrystallinecellulose, pre-gelatinized starch, water, etc., granulating, drying, andscreening to obtain particle bodies; then coating the particle bodieswith a phase change material to obtain cooling particles of properdiameters; and

2) molding the obtained cooling particles into a cylinder with definitesize, that is, the required cooling filter rod. or,

1) mixing plant fiber powder and/or inorganic material powder withrelevant auxiliary molding materials, granulating, drying, and screeningto obtain base particles;

2) heating a phase change material for melting, weighing a proper amountof flavor enhancer and adding it to the molten phase change material,stirring and shearing at a high speed for thorough and uniform mixing toobtain a mixed liquid for later use;

3) coating the base particles prepared in step 1) with the mixed liquidprepared in step 2) as a coating material to obtain cooling particles;and

4) molding the cooling particles prepared in step 3) into a cylinderwith definite size to obtain a flavor enhanced cooling filter rod.

Based on the same inventive concept, the present invention furtherprovides an application of the aforementioned cooling filter rod in theproduction of a cigarette.

Based on the same inventive concept, the present invention furtherprovides a cigarette, including the aforementioned cooling filter rod.

Further, a cigarette includes a smoking portion and a filter connectedin sequence, wherein the aforementioned cooling filter rod is arrangedinside the filter.

Optionally, the cooling filter rod is compounded with conventionalfilter rods in a certain ratio as a filter for conventional cigarettesor heat-not-burn cigarettes, for example, the cooling filter rod isarranged between two conventional filter rods to constitute a cigarettefilter portion (filter), and all high-temperature smoke needs to passthrough the cooling filter rod before entering the mouth to ensure thecooling effect. Different conventional filter rods are selectedaccording to different usage requirements.

Further, the conventional filter rods are acetate filter rods,polypropylene fiber filter rods, paper filter rods, empty tube rods,etc.

Compared with the prior art, the technical effects brought by thetechnical solution of the present invention are:

(1) The phase change material is coated on the surface of the particlematerial to form cooling particles, and the cooling particles areintegrally formed into a cooling filter rod, which can be directly usedfor cigarette production after being compounded with conventional filterrods.

(2) The cooling effect can be controlled according to the amount of thephase change material and the cooling filter rod. The form of thecooling filter rod is simple and novel, and the bran-new filter rodfacilitates industrial production and has low cost and good coolingeffect.

(3) The smoking resistance is small, and the contact area between thesmoke and the phase change material is large, so the cooling efficiencyis high, the temperature of smoke entering the smoker's mouth can begreatly reduced, and the experience is improved.

(4) The flavor enhancer is compounded with the phase change material, sothat the cooling filter rod realizes a flavoring function for the firsttime, and its the application value greatly increases.

(5) The temperature of smoke entering the mouth is greatly reduced bycontrolling the effective porosity of the cooling filter rod and usingthe means of no ventilation or dilution based on the principle ofphysical cooling, and the cooling amplitude can reach more than 50%.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The following examples are intended to illustrate the content of thepresent invention, rather than to further limit the protection scope ofthe present invention.

EXAMPLE 1

In this embodiment, the test process included the following steps:

1)100 parts of 100-150 mesh tobacco raw material powder, 20 parts ofmodified starch and 30 parts of microcrystalline cellulose by mass weretaken, mixed uniformly and then sprayed with 30 parts of water, followedby uniform mixing to prepare a mixed soft material; 2) the soft materialwas granulated by extrusion rounding, dried and sieved, and 20-50 meshtobacco particles were taken for later use; 3) the obtained tobaccoparticles were coated with molten PEG1500 in an amount of 10% of themass of the tobacco particles, followed by sieving, and 20-40 meshtobacco particles were taken as cooling tobacco particles; 4) theobtained cooling tobacco particles were continuously molded withmicrowave into a loose and porous cylinder with a circumference of 23.5mm, and the cylinder was cut into 120 mm long cooling filter rods; and5) the cooling filter rods were compounded with acetate fiber sectionsin a length ratio of 10:15 for preparing cigarettes, wherein the coolingsections were close to cut tobacco, and acetate fiber rods were alsoprepared into cigarettes of the same specification as a control. The twokinds of filter rod cigarettes were smoked, the temperatures at theoutlet ends of the filter rods were tested at the fifth time of smoking,and the results were shown in Table 1.

EXAMPLE 2

In this embodiment, the test process included the following steps:

1) 80 parts of 100-150 mesh corncob flour, 20 parts of calciumcarbonate, 10 parts of

HPMC and 40 parts of microcrystalline cellulose by mass were taken,mixed uniformly and then sprayed with 25 parts of water, followed byuniform mixing to prepare a mixed soft material; 2) the soft materialwas granulated by extrusion rounding, dried and sieved, and 20-50 meshcorncob particles were taken for later use; 3) stearic acid andpentaerythritol in a mass ratio of 1: 1 were melted to coat the obtainedcorncob particles in an amount of 5% of the mass of the corncobparticles, followed by sieving, and 10-50 mesh corncob particles weretaken as cooling corncob particles; 4) the obtained cooling corncobparticles were continuously molded into a loose and porous cylinder witha circumference of 23.5 mm by heat curing, and the cylinder was cut into84 mm long cooling filter rods; and 5) the cooling filter rods werecompounded with acetate fiber sections in a length ratio of 7:18 forpreparing cigarettes, wherein the cooling sections were close to cuttobacco, and acetate fiber rods were also prepared into cigarettes ofthe same specification as a control. The two kinds of filter rodcigarettes were smoked, the temperatures at the outlet ends of thefilter rods were tested at the fifth time of smoking, and the resultswere shown in Table 1.

EXAMPLE 3

In this embodiment, the test process included the following steps:

1) 60 parts of 100-150 mesh grapefruit peel powder, 40 parts of carbonpowder, 20 parts of modified starch, 20 parts of microcrystallinecellulose and 10 parts of lactose by mass were taken, mixed uniformlyand then sprayed with 25 parts of water, followed by uniform mixing toprepare a mixed soft material; 2) the soft material was granulated byextrusion rounding, dried and sieved, and 20-50 mesh particles weretaken for later use; 3) PEG3000, palmitic acid and stearate-isopropanolester in a mass ratio of 1: 1: 1 were melted to coat the obtainedparticles in an amount of 15% of the mass of the particles, followed bysieving, and 20-40 mesh particles were taken as cooling particles; 4)the obtained cooling particles were continuously molded with microwaveinto a loose and porous cylinder with a circumference of 23.5 mm, andthe cylinder was cut into 120 mm long cooling filter rods; and 5) thecooling filter rods were compounded with paper empty tube sections in alength ratio of 10:15 for preparing low-temperature cigarettes, whereinthe cooling sections were close to cut tobacco, and acetate fiber rodswere also prepared into low-temperature cigarettes of the samespecification as a control. The two kinds of filter rod cigarettes weresmoked, the temperatures at the outlet ends of the filter rods weretested at the fifth time of smoking, and the results were shown in Table1.

TABLE 1 Temperature test results Outlet temperature Outlet temperatureof samples of of samples of control rods cooling filter rods Example 165° C. 31° C. Example 2 67° C. 37° C. Example 3 55° C. 26° C.

The tests showed that the cooling filter rod provided by the presentinvention had a very obvious cooling effect, and compared withtraditional filter rod cigarettes, the outlet temperature was reduced bymore than 50%.

EXAMPLE 4

In this embodiment, the test process included the following steps:

1) 100 parts of 100-150 mesh tobacco raw material powder, 20 parts ofmodified starch and 30 parts of microcrystalline cellulose by mass weretaken, mixed uniformly and then sprayed with 30 parts of water, followedby uniform mixing to prepare a mixed soft material; 2) the mixed softmaterial was granulated by extrusion rounding, dried and sieved, and20-50 mesh cooling particle cores were taken for later use; 3) PEG2000was melted by heating and thoroughly mixed with menthone in a mass ratioof 100: 0.5 to obtain a mixed liquid; 4) the obtained cooling particlecores were coated with the mixed liquid in an amount of 10% of the massof cooling particles, followed by sieving, and 30-50 mesh coolingparticles containing menthone were taken; 5) the obtained coolingparticles were continuously molded with microwave into a loose andporous cylinder with a circumference of 23.5 mm, and the cylinder wascut into 120 mm long cooling filter rod sections; and 6) the coolingfilter rod sections were compounded with acetate fiber sections in alength ratio of 10: 15 for preparing cigarettes, wherein the coolingsections were close to cut tobacco, and acetate fiber rods were alsoprepared into cigarettes of the same specification as a control. The twokinds of filter rod cigarettes were smoked, the temperatures at theoutlet ends of the filter rods were tested at the fifth time of smoking,and the temperature test results were shown in Table 2. At the sametime, the two kinds of cigarettes smoked were evaluated, and the resultswere shown in Table 3.

EXAMPLE 5

In this embodiment, the test process included the following steps:

1) 80 parts of 100-150 mesh corncob flour, 20 parts of calciumcarbonate, 10 parts of HPMC and 40 parts of microcrystalline celluloseby mass were taken, mixed uniformly and then sprayed with 25 parts ofwater, followed by uniform mixing to prepare a mixed soft material; 2)the mixed soft material was granulated by extrusion rounding, dried andsieved, and 20-50 mesh cooling particle cores were taken for later use;3) stearic acid and pentaerythritol in a mass ratio of 1: 1 were meltedby heating, and mixed thoroughly and uniformly with a tobacco extract ina mass ratio of 100: 5 to obtain a mixed liquid; 4) the obtained coolingparticles were coated with the mixed liquid in an amount of 5% of themass of the cooling particles, followed by sieving, and 20-40 meshflavor enhanced cooling particles containing the tobacco extract weretaken; 5) the obtained cooling particles were continuously molded into aloose and porous cylinder with a circumference of 23.5 mm by heatcuring, and the cylinder was cut into 84 mm long cooling filter rodsections; and 6) the cooling filter rod sections were compounded withacetate fiber sections in a length ratio of 7:18 for preparingcigarettes, wherein the cooling sections were close to cut tobacco, andacetate fiber rods were also prepared into cigarettes of the samespecification as a control. The two kinds of filter rod cigarettes weresmoked, the temperatures at the outlet ends of the filter rods weretested at the fifth time of smoking, and the results were shown in Table2. At the same time, the two kinds of cigarettes smoked were evaluated,and the results were shown in Table 3.

EXAMPLE 6

In this embodiment, the test process included the following steps:

1) 60 parts of 100-150 mesh grapefruit peel powder, 40 parts of carbonpowder, 20 parts of modified starch, 20 parts of microcrystallinecellulose and 10 parts of lactose by mass were taken, mixed uniformlyand then sprayed with 25 parts of water, followed by uniform mixing toprepare a mixed soft material; 2) the mixed soft material was granulatedby extrusion rounding, dried and sieved, and 20-50 mesh cooling particlecores were taken for later use; 3) PEG3000, palmitic acid andstearate-isopropanol ester in a mass ratio of 1:1:1 were melted byheating, and mixed thoroughly and uniformly with coffee flavor in a massratio of 100:2 to obtain a mixed liquid; 4) the obtained coolingparticle cores were coated with the mixed liquid in an amount of 15% ofthe mass of cooling particles, followed by sieving, and 20-40 meshcooling particles were taken; 5) the obtained cooling particles werecontinuously molded with microwave into a loose and porous cylinder witha circumference of 23.5 mm, and the cylinder was cut into 120 mm longcooling filter rod sections; and 6) the cooling filter rod sections werecompounded with paper empty tube sections in a length ratio of 10:15 forpreparing low-temperature cigarettes, wherein the cooling sections wereclose to cut tobacco, and acetate fiber rods were also prepared intolow-temperature cigarettes of the same specification as a control. Thetwo kinds of filter rod cigarettes were smoked, the temperatures at theoutlet ends of the filter rods were tested at the fifth time of smoking,and the results were shown in Table 2. At the same time, the two kindsof cigarettes smoked were evaluated, and the results were shown in Table3.

TABLE 2 Temperature test results Outlet temperature Outlet temperatureof samples of of samples of flavor control rods enhanced cooling filterrods Example 4 65° C. 31° C. Example 5 67° C. 37° C. Example 6 55° C.26° C.

The tests showed that the cooling filter rod provided by the presentinvention had a very obvious cooling effect.

TABLE 3 Results of cigarette smoking evaluation Samples of control rodSamples of flavor enhanced samples cooling filter rods Example 4Relatively full and Full and relatively harmonious harmonious flavor,slightly flavor, slightly mixed with mixed with impure smoke, impuresmoke, moderate cooling and burning sensation at the sensation, and gooduniformity last two streams of smoke throughout smoking Example 5Relatively full and Full and relatively harmonious harmonious flavor,slightly flavor, slightly mixed with mixed with impure smoke, impuresmoke, thicker tobacco and burning sensation at the aroma, and gooduniformity last two streams of smoke throughout smoking Example 6Relatively full flavor, Full flavor, enough smoke, no enough smoke, andburning burning sensation, light sensation at the first two coffeeaftertaste, and release streams of smoke uniformity throughout smoking

The contents illustrated by the above embodiments should be understoodas these embodiments are merely used for illustrating the presentinvention more clearly, rather than limiting the scope of the presentinvention. Various equivalent modifications made to the presentinvention by those skilled in the art after reading the presentinvention all fall within the scope defined by the appended claims ofthe present application.

1-12. (canceled)
 13. A cooling filter rod, mainly formed by coolingparticles, wherein: a cooling particle of the cooling particlescomprises a particle body and a shell coated on the particle body, andthe shell and/or the particle body contains a phase change material. 14.The cooling filter rod according to claim 13, wherein the phase changematerial comprises at least one of PLA, polyethylene glycol, stearicacid, palmitic acid, paraffin, microcrystalline wax, EVA,pentaerythritol, stearate-isopropanol ester, and stearate-glycerolester.
 15. The cooling filter rod according to claim 13, wherein: theshell further comprises a flavor enhancer; further, the flavor enhancercomprises a flavor and/or a tobacco extract; and preferably, the massratio of the phase change material to the flavor enhancer is 100:(0.5-10).
 16. The cooling filter rod according to claim 13, wherein themass of the shell accounts for 0.5-30% of the total mass of the coolingparticle.
 17. The cooling filter rod according to claim 13, wherein: theparticle body contains plant fiber powder and/or inorganic materialpowder; the plant fiber powder comprises at least one of tobacco powder,corncob powder, rice husk powder, walnut shell powder, coconut shellpowder, tangerine peel powder, and grapefruit peel powder; the inorganicmaterial powder comprises at least one of calcium carbonate, carbonpowder, ceramics, silica gel, and molecular sieves; and the particlebody comprises an auxiliary molding material, and the auxiliary moldingmaterial comprises at least one of a binder, a wetting agent, and anexcipient.
 18. The cooling filter rod according to claim 13, wherein theparticle body is obtained by thoroughly mixing base powder, hot meltadhesive powder, excipients, and water, granulating, drying, andsieving; wherein: the base powder comprises at least one of plantmaterials, inorganic materials, and metal powder; the plant materialscomprise at least one of tobacco raw materials, straw, peanut shells,bagasse, corncobs, pericarp, and aromatic plants; the inorganicmaterials comprise at least one of carbon powder, clay, calciumcarbonate, and silicon oxide; and the metal powder comprises at leastone of iron powder, aluminum oxide, and copper powder.
 19. The coolingfilter rod according to claim 13, wherein the cooling particles have adiameter of 10 to 50 meshes.
 20. The cooling filter rod according toclaim 14, wherein the cooling particles have a diameter of 10 to 50meshes.
 21. The cooling filter rod according to claim 15, wherein thecooling particles have a diameter of 10 to 50 meshes.
 22. The coolingfilter rod according to claim 16, wherein the cooling particles have adiameter of 10 to 50 meshes.
 23. The cooling filter rod according toclaim 17, wherein the cooling particles have a diameter of 10 to 50meshes.
 24. The cooling filter rod according to claim 13, wherein theeffective porosity inside the cooling filter rod is 65-95%.
 25. Thecooling filter rod according to claim 14, wherein the effective porosityinside the cooling filter rod is 65-95%.
 26. The cooling filter rodaccording to claim 15, wherein the effective porosity inside the coolingfilter rod is 65-95%.
 27. The cooling filter rod according to claim 16,wherein the effective porosity inside the cooling filter rod is 65-95%.28. The cooling filter rod according to claim 17, wherein the effectiveporosity inside the cooling filter rod is 65-95%.
 29. The cooling filterrod according to claim 19, wherein: when the cooling particles are usedfor heat-not-burn cigarettes, the granulation is extrusion roundinggranulation; and the cooling particles are spherical or approximatelyspherical, and have a bulk density of 0.8 to 2.5 g/ml.
 30. The coolingfilter rod according to claim 19, wherein when the cooling particles areused for conventional cigarettes, the cooling particles are spherical oramorphous, and have a bulk density of 0.4 to 1.6 g/ml.
 31. A method ofmaking a cigarette comprising using the cooling filter rod according toclaim
 13. 32. A cigarette, comprising a cooling filter rod, wherein thecooling filter rod comprises: a cooling particle of the coolingparticles comprises a particle body and a shell coated on the particlebody, and the shell contains a phase change material.